Civil Engineering Reference
In-Depth Information
Center is on alert around the clock which is put to trial once a week. A-users
exercise with the system roughly once or twice per week. National exercises are
conducted approximately once or twice a year, and there is also participation in
international exercises.
21.4.2 Modes of Operation in the RODOS Center
In the pre-release phase, interactive prognosis calculations are carried out on the
basis of meteorological forecast data provided by the German Weather Service and
assumed source terms.
In the release phase, RODOS performs the following functions:
• Progressing diagnosis calculations are carried out automatically in ten-minutes
cycles, based on measurement data from the German KF
¨
surveillance system
• Prognoses calculations are issued automatically every 60 min, based on current
meteorological forecast data from the Germany Weather Service and assump-
tions about the source term
• Supplementary interactive calculations are carried out on demand
In the case that new information about the source term is received during an
ongoing accident, RODOS repeats the diagnostic calculations from the beginning
of the accident until the current “now time”, using the new source term together
with existing weather data. When this is finished all calculations proceed in real
time in the usual way.
The post-release phase is the domain of repeated interactive calculations with
RODOS using the results calculated for the release phase, measurements from the
IMIS system and from other sources as they become available.
21.5 Adaptation to National Conditions
Comprehensive computer-based decision support systems can provide realistic
results only if the data required for the calculation sufficiently reflect the situation
in the area under consideration. The default data outfit provided with the standard
release of JRodos consists of a geo-referenced database covering the whole world
6
in a relatively coarse resolution, a comprehensive data base about nuclear power
plants and other facilities of the nuclear fuel cycle, country-specific intervention
levels for emergency measures, and the possibility to switch between several
languages.
7
6
New feature in 2013; until then the default data base covered Europe only.
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Available in 2011 in English, Russian, Ukrainian.
